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Scalable photonic-phonoinc integrated circuitry for reconfigurable signal processing
Liang Zhang1,2, Chaohan Cui2, Yongzhou Xue2
1Chandra Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, USA.
Nature Communications
|March 20, 2025
Summary
Gallium nitride on sapphire enables scalable photonic-phononic circuits by confining light and sound. This breakthrough allows efficient signal processing and reconfigurable conversion between radio frequency and optical signals.
Area of Science:
- Photonics and Acoustics
- Materials Science
- Integrated Optics
Background:
- Photon-phonon interactions are vital for optical devices, quantum technologies, and metrology.
- Integrated photonic-phononic devices offer enhanced interaction but face material limitations for large-scale circuits.
Purpose of the Study:
- To overcome material limitations in large-scale integrated photonic-phononic circuits.
- To demonstrate a scalable platform for efficient photonic-phononic signal processing.
Main Methods:
- Utilizing gallium nitride on sapphire for sub-wavelength confinement of optical and acoustic fields.
- Developing integrated circuits without suspended structures for simultaneous optical and acoustic field manipulation.
- Leveraging controlled photonic-phononic interaction and the piezoelectric effect.
Main Results:
- Achieved efficient launching, flexible routing, and reconfigurable processing of optical and acoustic fields.
- Demonstrated reconfigurable conversion between frequency-multiplexed radio frequency (RF) and optical signals via acoustics.
- Established a scalable platform for high-performance photonic-phononic hybrid systems.
Conclusions:
- Gallium nitride on sapphire provides a viable solution for scalable integrated photonic-phononic circuits.
- The developed platform enables high efficiency, multiple functionalities, and large-scale integration.
- This work paves the way for advanced photonic-phononic hybrid systems in various applications.
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